Driving means for rotary devices



Get. 16, 1928.

J. R; MAHAN ET AL DRIVING MEANS FOR ROTARY DEVICES Filed April 18, 19272 Sheets-Sheet 1 'A TTORNEY J. R. MAHAN ET AL Filed April 18, 1921DRIVING MEANS FOR ROTARY DEVICES \1 6 3 w 2 m z w m z \\.\mk\ \\\\\\\N\N/A.////////%/// x u n 1 w w 1 m u .k B w I Oct, 16, 1928.

7 V/IQII e Patented Oct. 16, 1928.

JQSEPH R. MAI-IAN AND JOHN B. mean-n,

1,es,s,0s4 .PATENTQOFFICE.

or TOLEDO, omo, ASSIGNORS T0 in NA- TIONAL SUPPLY COMPANY, or TOLEDO,OHIO, -A CORPORATION OF OHIO.

DRIVING MEANS FOR 7 ROTARY DEVICES Our invention relates to drivingmeans for rotary devices. The invention is illustrated and described inconnection with means for driving eccentrics used in operating pumpingmechanisms, but it is not limited either to eccentrics or pumpingmechanisms. i r

In pumping powers for wells, one-or more horizontal eccentrics arestrung on a vertical spindle. A driving wheel is also strung on thespindle and rests on the top eccentric. The driving wheel andeccentricor eccentrics are connected into a rigid unit by means ofvertical bolts which pass through holes in the same. Also the drivingwheel has a driving arm which interlocks with the eccentric next belowit, and, in case there are two eccentrics,'the top eccentric has adriving arm whichinterlocks withthe lower eccentric it beingintendedthat the bolts and the driving arm or armsshall take proportionate partsof the torsional strains required to drive the eccentric or eccentrics.

Fi 2 a central section taken in the vertical 7 It is one object of thisinvention to .provide adjustments whereby the bolts and ClIlV- in g armsmay be made to do their proportion" of the work. Another object is toconstruct and-arrange the adjusting means so that they will in additionto their function of making and securing the adjustment mentioned,

take a portion of the lateral strains exerted transversely of a verticalplane 111Wl110l1 the bolts stand. Another object is to provide means forgreatly relieving the driving arm or arms from vertical downward strainsdue to the downward movement of theadjusting wedges which bear thereon.The wedges take the up thrust of thearnror arms when the unit tends totilt in a direction opposite to that in which the arm or arms extend.

This invention is an improvement on the structures shown in Schwimmer.and lVrights Patents 1,612,989 granted January 4:, 1 927 and 1,6i8,066granted Nov. 8, 1927.

Referring to the accompanying drawings, Fig. 1 is a horizontalcross-section on the line 1-1 of-Fi g. 2, parts being broken-away planein which the bolts ll and 12-stand, portions at the top and sides beingbroken away; Fig. 8,a section on the line-3-3 of Fig. l ;'and Fig. l, asection on the line 41- 1 or" Fig. 1. I 1

On the drawing, 1 designates a vertical spindle having the base 2 onwhich rests the .friction ring encircling the spindle. The

bushing 4 surroundsthe spindleand hasthe flange'o' seated onthe saidring. The eccentric 6 is mounted onthe bushing and rests onthe flange 5and carriesthe eccentric strapfY. 1 l

On the top of the eccentric 6 rests the eccentric 8 also mounted onthebushing 4 andcarrying the eccentric strap 9. The

driving member 10, whichm'ay'bethe lower part of a band-wheel or otherdriving wheel rests on the eccentricS and embraces the said'spindle l. I

The said two eccentrics 6 and 8 and-the driving member 10 are tightlyclamped to gether into a rigid unit by the two :bolts -'11- and 12arranged parallel with the spindle and on opposite sides thereof.

Thedrivingmember 10, whether bandwheel or gear wheel, has thehorizontallyextending driving arm .13 preferably cast integrallytherewith. The outer'or free end of the arm 13 lies between twoupstanding lugs 14 on the eccentric 8, the :opposing faces of which lugsare vertical or parallel with the aXiaLIcenter of the-eccentric 8. Thelateral edges of thearm l3 diverge downwardly. Wedges 15 are seatedbetween each lug 14 and the nearestinclined edge or face of the arm. Theends 16 of the wedges next to the, lugs are parallel with the faces 17of the lugs they engage, and the I I between two lugs 14 engaged by thewedges 15? which are operated and held in place by the bolts 20,-thelugs li vbeing on the upper face of the eccentric 6. It is not necessary'to describe theparts 13 ,149, 15 and 20% as they are like the partsr13,14,15, a-nd 20, respectively, and provide the same connections andfunctions between the twoeccen tries as are-provided between the uppereccentric 8 and the member 10,

In .devices ofthe' character described it is desirable that the bolts 11and 12 by their reaction to shearing carry a proportionate share of thetorque through the several parts of the unit connected together bythem.This is done by rotating the eccentrics and driving member 10 so thatall lost motion between the, bolts and the holes they are inis alltakenup in the direction in which the eccentrics and driving memberrotate V in practice. The bolts engage the sides of the holes as shownin Fig.1,the rotation being in the direction shown by the arrow. In Fig.1,"the left-hand wedge 15 will be first tightly seated; then theright-hand wedge will be secured tightly in place. Also the righthandwedge 15 will be. secured in place before the left-hand wedge. Theopposing faces of the lugs 1 1 and 14 are made vertical or parallel withthe center of the spindle I so as not to. change the relation of thebolts to the parts through which they pass, as the wedges are forceddownwardly.

The opposingfac'es of the lugs l t and 14; are made arc-shaped so thatthe wedges may adjust themselves by sliding on those faces to fitsquarely against'the arms 13 and 13.

It will be noted particularly in Fig. 4c that the .arm 13 rests atopposite sides of the wedges, upon machined surfaces on the two rests 23and 24 on the eccentric 8. These rests prevent downward strains tendingto weaken or break the arm 1301f from the member 10.1 The arm 13'together with the wedges 15 resist tilting strains exerted be tween theeccentric'and member 10 at right angles to a vertical plane WlllCllincludes the bolts 11 and 12. The two bolts 11 and 12 resist to a largeextent tilting strains exerted in a vertical plane in which the boltsstand.

The lower eccentric 6 will have rests (only one, Q3,shown) for the arm13.

. f We claim 7 reaction against the lugs, clamping the arm against thearm-supporting means and pre venting the arm from any movementindependent "of the movements of the sald elements.

. 3. A rotary driving element, a rotary driven element, an arm prOecting from one element, a pair of lugs carried by the other element andhaving the arm between them,

bearing the arm, bolts clamping the elements 7 into a unit, and wedgingmeans cooperating with the arm and the lugs for binding the arm againstthe said supporting means and for preventing the arm from moving towardeither lug and for causing all slack between the sides of the bolts andthe holes they occupy to be taken up in the direction of rotationof theelements. I 1

5. In a pumping power, a vertical spindle,

superposed eccentricwand' driving members one member, an arm carried onthe other member and lying between the lugs, the

rotatable around the spindle, spaced lugs on arm having opposite edgesconverging upi wardly, wedges seated against the opposing faces of thelugs and havinginclined surfaces resting on the said converging edges,bolts clamping the said members together,

and two other bolts, one-acting on one wedge to cause all slack betweenthe sides of the bolts and the holes they occupy to be taken up in thedirection of rotation of the members, and the other acting on the'otherwedge to hold it in place.

6. In a pumping power, a vertical spindle, superposed eccentric anddriving members rotatable around the spindle, spaced lugs on one member,an arm carried on the other member and lying between the lugs, the armhaving opposite edges convergingupwardly, wedges seated against theopposing faces of the lugs andhaving inclined surfaces resting onthesaid converging edges,rcsts for the arm, carried by the member notbearing the arm, bolts clamping the said members t0- gether, and twoother bolts, one acting. on one wedge to cause all slack between thesides of the bolts and the holesthey occupy to be taken up in thedirection of rotation of the members, and the other acting on the 7other wedge to hold it in place. v

In testimony whereof, we hereunto afliX our signatures.

JOSEPH n. MAHAN. JOHN B. PICARD. V

